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<title>Advanced Uploader Example With Transparent UI and Automatic Queue Management</title>

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<h1>Advanced Uploader Example With Transparent UI and Automatic Queue Management</h1>

<div class="exampleIntro">
	<p>This example demonstrates how the Uploader can be rendered as a transparent layer on top of your own UI, and how the upload queue of multiple files can be managed automatically.</p>

<p><strong>Note:</strong> The YUI Uploader Control requires Flash Player 9.0.45 or higher. The latest version of Flash Player is available at the <a href="http://www.adobe.com/go/getflashplayer">Adobe Flash Player Download Center</a>.</p>
<p><strong>Note:</strong> The YUI Uploader Control requires the uploader.swf Flash file that is distributed as part of the YUI package, in the uploader/assets folder. Copy the uploader.swf to your server and set the YAHOO.Uploader.SWFURL variable to its full path.</p>
<p><strong>Note:</strong> This example uses a server-side script to accept file uploads. The script used does not open or store any data sent to it. Nonetheless, when trying out the example, do not send any sensitive or private data. Do not exceed file size of 10 MB.			
</div>

<!--BEGIN SOURCE CODE FOR EXAMPLE =============================== -->

<style>
#selectFilesLink a, #uploadFilesLink a, #clearFilesLink a {
	color: #0000CC;
	background-color: #FFFFFF;
}

#selectFilesLink a:visited, #uploadFilesLink a:visited, #clearFilesLink a:visited {
	color: #0000CC;
	background-color: #FFFFFF;
}

#uploadFilesLink a:hover, #clearFilesLink a:hover {	
	color: #FFFFFF;
	background-color: #000000;
}
</style>

<div id="uiElements" style="display:inline;">
		<div id="uploaderContainer">
			<div id="uploaderOverlay" style="position:absolute; z-index:2"></div>
			<div id="selectFilesLink" style="z-index:1"><a id="selectLink" href="#">Select Files</a></div>
		</div>
		<div id="uploadFilesLink"><a id="uploadLink" onClick="upload(); return false;" href="#">Upload Files</a></div>
</div>

<div id="simUploads"> Number of simultaneous uploads:
	<select id="simulUploads">
		<option value="1">1</option>
		<option value="2">2</option>
		<option value="3">3</option>
		<option value="4">4</option>
	</select>
</div>

<div id="dataTableContainer"></div>

<script type="text/javascript">

YAHOO.util.Event.onDOMReady(function () { 
var uiLayer = YAHOO.util.Dom.getRegion('selectLink');
var overlay = YAHOO.util.Dom.get('uploaderOverlay');
YAHOO.util.Dom.setStyle(overlay, 'width', uiLayer.right-uiLayer.left + "px");
YAHOO.util.Dom.setStyle(overlay, 'height', uiLayer.bottom-uiLayer.top + "px");
});

	// Custom URL for the uploader swf file (same folder).
	YAHOO.widget.Uploader.SWFURL = "assets/uploader.swf";

    // Instantiate the uploader and write it to its placeholder div.
	var uploader = new YAHOO.widget.Uploader( "uploaderOverlay" );
	
	// Add event listeners to various events on the uploader.
	// Methods on the uploader should only be called once the 
	// contentReady event has fired.
	
	uploader.addListener('contentReady', handleContentReady);
	uploader.addListener('fileSelect', onFileSelect)
	uploader.addListener('uploadStart', onUploadStart);
	uploader.addListener('uploadProgress', onUploadProgress);
	uploader.addListener('uploadCancel', onUploadCancel);
	uploader.addListener('uploadComplete', onUploadComplete);
	uploader.addListener('uploadCompleteData', onUploadResponse);
	uploader.addListener('uploadError', onUploadError);
    uploader.addListener('rollOver', handleRollOver);
    uploader.addListener('rollOut', handleRollOut);
    uploader.addListener('click', handleClick);
    	
    // Variable for holding the filelist.
	var fileList;
	
	// When the mouse rolls over the uploader, this function
	// is called in response to the rollOver event.
	// It changes the appearance of the UI element below the Flash overlay.
	function handleRollOver () {
		YAHOO.util.Dom.setStyle(YAHOO.util.Dom.get('selectLink'), 'color', "#FFFFFF");
		YAHOO.util.Dom.setStyle(YAHOO.util.Dom.get('selectLink'), 'background-color', "#000000");
	}
	
	// On rollOut event, this function is called, which changes the appearance of the
	// UI element below the Flash layer back to its original state.
	function handleRollOut () {
		YAHOO.util.Dom.setStyle(YAHOO.util.Dom.get('selectLink'), 'color', "#0000CC");
		YAHOO.util.Dom.setStyle(YAHOO.util.Dom.get('selectLink'), 'background-color', "#FFFFFF");
	}
	
	// When the Flash layer is clicked, the "Browse" dialog is invoked.
	// The click event handler allows you to do something else if you need to.
	function handleClick () {
	}
	
	// When contentReady event is fired, you can call methods on the uploader.
	function handleContentReady () {
	    // Allows the uploader to send log messages to trace, as well as to YAHOO.log
		uploader.setAllowLogging(true);
		
		// Allows multiple file selection in "Browse" dialog.
		uploader.setAllowMultipleFiles(true);
		
		// New set of file filters.
		var ff = new Array({description:"Images", extensions:"*.jpg;*.png;*.gif"},
		                   {description:"Videos", extensions:"*.avi;*.mov;*.mpg"});
		                   
		// Apply new set of file filters to the uploader.
		uploader.setFileFilters(ff);
	}

	// Actually uploads the files. In this case,
	// uploadAll() is used for automated queueing and upload 
	// of all files on the list.
	// You can manage the queue on your own and use "upload" instead,
	// if you need to modify the properties of the request for each
	// individual file.
	function upload() {
	if (fileList != null) {
		uploader.setSimUploadLimit(parseInt(document.getElementById("simulUploads").value));
		uploader.uploadAll("http://www.yswfblog.com/upload/upload_simple.php", "POST", null, "Filedata");
	}	
	}
	
	// Fired when the user selects files in the "Browse" dialog
	// and clicks "Ok".
	function onFileSelect(event) {
		if('fileList' in event && event.fileList != null) {
			fileList = event.fileList;
			createDataTable(fileList);
		}
	}

	function createDataTable(entries) {
	  rowCounter = 0;
	  this.fileIdHash = {};
	  this.dataArr = [];
	  for(var i in entries) {
	     var entry = entries[i];
		 entry["progress"] = "<div style='height:5px;width:100px;background-color:#CCC;'></div>";
	     dataArr.unshift(entry);
	  }
	
	  for (var j = 0; j < dataArr.length; j++) {
	    this.fileIdHash[dataArr[j].id] = j;
	  }
	
	    var myColumnDefs = [
	        {key:"name", label: "File Name", sortable:false},
	     	{key:"size", label: "Size", sortable:false},
	     	{key:"progress", label: "Upload progress", sortable:false}
	    ];

	  this.myDataSource = new YAHOO.util.DataSource(dataArr);
	  this.myDataSource.responseType = YAHOO.util.DataSource.TYPE_JSARRAY;
      this.myDataSource.responseSchema = {
          fields: ["id","name","created","modified","type", "size", "progress"]
      };

	  this.singleSelectDataTable = new YAHOO.widget.DataTable("dataTableContainer",
	           myColumnDefs, this.myDataSource, {
	               caption:"Files To Upload",
	               selectionMode:"single"
	           });
	}

    // Do something on each file's upload start.
	function onUploadStart(event) {
	
	}
	
	// Do something on each file's upload progress event.
	function onUploadProgress(event) {
		rowNum = fileIdHash[event["id"]];
		prog = Math.round(100*(event["bytesLoaded"]/event["bytesTotal"]));
		progbar = "<div style='height:5px;width:100px;background-color:#CCC;'><div style='height:5px;background-color:#F00;width:" + prog + "px;'></div></div>";
		singleSelectDataTable.updateRow(rowNum, {name: dataArr[rowNum]["name"], size: dataArr[rowNum]["size"], progress: progbar});	
	}
	
	// Do something when each file's upload is complete.
	function onUploadComplete(event) {
		rowNum = fileIdHash[event["id"]];
		prog = Math.round(100*(event["bytesLoaded"]/event["bytesTotal"]));
		progbar = "<div style='height:5px;width:100px;background-color:#CCC;'><div style='height:5px;background-color:#F00;width:100px;'></div></div>";
		singleSelectDataTable.updateRow(rowNum, {name: dataArr[rowNum]["name"], size: dataArr[rowNum]["size"], progress: progbar});
	}
	
	// Do something if a file upload throws an error.
	// (When uploadAll() is used, the Uploader will
	// attempt to continue uploading.
	function onUploadError(event) {

	}
	
	// Do something if an upload is cancelled.
	function onUploadCancel(event) {

	}
	
	// Do something when data is received back from the server.
	function onUploadResponse(event) {

	}
</script>



<!--END SOURCE CODE FOR EXAMPLE =============================== -->

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